Home / 672,080.70-1,008,121.05-388,256.70

Finding the Fourth Proportional to 672,080.70, 1,008,121.05 and 388,256.70

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Solution

The fourth proportional to 672,080.70, 1,008,121.05 and 388,256.70 is: 582,385.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,080.70 : 1,008,121.05 = 388,256.70 : x
  2. Step 2: Convert to fraction form
    672,080.70/1,008,121.05 = 388,256.70/x
  3. Step 3: Cross multiply
    672,080.70x = 1,008,121.05 × 388,256.70
  4. Step 4: Simplify right side
    672,080.70x = 391,409,752,073.54
  5. Step 5: Solve for x
    x = 391,409,752,073.54/672,080.70
  6. Step 6: Final answer
    x = 582,385.05

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.